muscle terms 9

Muscle function and naming terms.
Origin-muscle attachment site that is on a stationary bone during a contraction.

Insertion-muscle attachment site in a moving bone during a contraction.

Belly-The part of body between the pelvis and thorax.

Agonist-muscle that produces the desired motion.

Antagonist-muscle with the opposite action of the agonist and is relaxing as the agonist is contracting.

Synergist-a musvle that assists the prime mover/agonist and helps stabilize the joint being moved.

Fixator- muscles that stabilize the prime movers/agonist so the prime mover can work efficent.

Rectus-the fibers run parallel to the midline.

Transverse- Fibers run perpendicular to the midline.

Oblique- fibers run diagonally to the midline

Maximus- mean largest

Minimus- The smallest

Longus- means the longest

Brevis- short

Major-large

minor-small

vastus- great

Biceps-A muscle with two heads or point of origin

Triceps-a three headed muscle of the upper arm.

quadriceps- the large four part extensor muscle at the end of the thigh

deltoid- triangular in shape

trapezius- a large flat,triangular, superficial muscle of the shoulder and upper back.

serattus- any of several muscles of the trunk.

rhomboid- shaped like a muscle rhombus.

orbicularis-muscles of the eyes.

abbductor- moves the bone away from midline

adductor- moves the bone closer to the midline.

flexor- decreases the angle at a joint.

extensor- increase angle at a joint.

levator- produces an upward movement.

depressor- produces a downward movement.

supinator- turs the palm upward

pronator- turns the palm downward.